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AS3598 Microsoft Corporation

MICROSOFT-CORP-AS - Microsoft Corporation · registered in the United States

IPv4 addresses531,20027 prefixes · 0.017% of announced IPv4
Rank in United States#160largest network in US by IPv4 space, of 18,338 · 0.04% of US
Rank worldwide#553of 79,396 networks with IPv4
IPv62 x /32 (196,603 x /48)81 prefixes
CountryUnited States18,679 ASNs registered there
Open AS3598 in ASN lookup Look up an IP in this network (65.53.0.1) All networks in United States

IPv4 prefixes

All 27 prefixes, in address order.

  • 65.53.0.0/16
  • 131.107.0.0/16
  • 157.54.0.0/16
  • 157.57.0.0/16
  • 157.58.0.0/17
  • 157.58.128.0/18
  • 157.58.192.0/20
  • 157.58.208.0/21
  • 157.58.217.0/24
  • 157.58.218.0/23
  • 157.58.220.0/22
  • 157.58.224.0/19
  • 157.59.0.0/16
  • 157.60.0.0/16
  • 167.220.0.0/17
  • 167.220.128.0/18
  • 167.220.192.0/19
  • 167.220.224.0/23
  • 167.220.228.0/22
  • 167.220.232.0/21
  • 167.220.240.0/22
  • 167.220.248.0/21
  • 194.69.96.0/21
  • 194.69.106.0/23
  • 194.69.108.0/22
  • 194.69.112.0/20
  • 198.105.232.0/22

IPv6 prefixes

All 81 prefixes.

  • 2001:4898::/33
  • 2001:4898:8000::/35
  • 2001:4898:a000::/36
  • 2001:4898:b000::/41
  • 2001:4898:b081::/48
  • 2001:4898:b082::/47
  • 2001:4898:b084::/46
  • 2001:4898:b088::/45
  • 2001:4898:b090::/44
  • 2001:4898:b0a0::/43
  • 2001:4898:b0c0::/42
  • 2001:4898:b100::/40
  • 2001:4898:b200::/39
  • 2001:4898:b400::/38
  • 2001:4898:b800::/37
  • 2001:4898:c000::/34
  • 2404:f801::/33
  • 2404:f801:8000::/43
  • 2404:f801:8021::/48
  • 2404:f801:8022::/47
  • 2404:f801:8024::/46
  • 2404:f801:8028::/46
  • 2404:f801:802d::/48
  • 2404:f801:802e::/47
  • 2404:f801:8030::/44
  • 2404:f801:8040::/42
  • 2404:f801:8080::/41
  • 2404:f801:8100::/40
  • 2404:f801:8200::/39
  • 2404:f801:8400::/38
  • 2404:f801:8800::/37
  • 2404:f801:9000::/36
  • 2404:f801:a000::/35
  • 2404:f801:c000::/34
  • 2a01:110::/33
  • 2a01:110:8000::/43
  • 2a01:110:8020::/48
  • 2a01:110:8021::/48
  • 2a01:110:8022::/47
  • 2a01:110:8024::/46
  • 2a01:110:8028::/45
  • 2a01:110:8030::/44
  • 2a01:110:8040::/43
  • 2a01:110:8060::/45
  • 2a01:110:8068::/48
  • 2a01:110:8069::/48
  • 2a01:110:806a::/47
  • 2a01:110:806c::/46
  • 2a01:110:8070::/44
  • 2a01:110:8080::/41
  • 2a01:110:8100::/40
  • 2a01:110:8200::/39
  • 2a01:110:8400::/38
  • 2a01:110:8800::/37
  • 2a01:110:9000::/45
  • 2a01:110:9009::/48
  • 2a01:110:900a::/47
  • 2a01:110:900c::/46
  • 2a01:110:9010::/44
  • 2a01:110:9020::/43
  • 2a01:110:9040::/42
  • 2a01:110:9080::/41
  • 2a01:110:9100::/40
  • 2a01:110:9200::/39
  • 2a01:110:9400::/38
  • 2a01:110:9800::/37
  • 2a01:110:a000::/35
  • 2a01:110:c000::/35
  • 2a01:110:e000::/42
  • 2a01:110:e040::/44
  • 2a01:110:e051::/48
  • 2a01:110:e052::/47
  • 2a01:110:e054::/46
  • 2a01:110:e058::/45
  • 2a01:110:e060::/43
  • 2a01:110:e080::/41
  • 2a01:110:e100::/40
  • 2a01:110:e200::/39
  • 2a01:110:e400::/38
  • 2a01:110:e800::/37
  • 2a01:110:f000::/36

Other ASNs named Microsoft Corporation

11 other networks use the same organisation name; together with AS3598 they announce 82,657,024 IPv4 addresses.

ASNNameIPv4 addresses
AS8075MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US80,749,056
AS8070MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US1,073,920
AS8069MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US285,184
AS8068MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation US9,984
AS12076MICROSOFT - Microsoft Corporation US2,048
AS54396NUANCE-MOBILITY - Microsoft Corporation US2,048
AS46182VAROLII - Microsoft Corporation US1,536
AS17144NUANCE-NOD - Microsoft Corporation US1,024
AS63314MSFT - Microsoft Corporation US768
AS5761MICROSOFT-CORP-MSN-AS-SATURN - Microsoft Corporation US256
AS6584MICROSOFT-GP-AS - Microsoft Corporation USIPv6 only

Similar-sized networks in United States

ASNNameIPv4 addresses
AS19773#157 MOTOROLA-SOLUTIONS - Motorola, Inc.545,280
AS10430#158 WA-K20 - Washington State K-20 Telecommunications Network539,136
AS19994#159 RACKSPACE - Rackspace Hosting537,088
AS7726#161 FITC-AS - FedEx Internet Technologies Corporation531,200
AS5852#162 DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD)526,592
AS26496#163 AS-26496-GO-DADDY-COM-LLC - GoDaddy.com, LLC524,288

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources